Year	constant 2015 US$
1960	8730.557759016832
1961	9393.33091284802
1962	9859.970787245677
1963	10520.008305345287
1964	10914.564574727281
1965	11488.182648814005
1966	11190.85610125521
1967	11038.95091388466
1968	12566.37301664104
1969	13904.019664425326
1970	14433.401155795715
1971	15518.304052926447
1972	16966.503794826654
1973	17204.04187413091
1974	17781.1876740117
1975	17943.354211541246
1976	17603.79911687843
1977	17392.22770449143
1978	17975.292934269462
1979	18607.07942009731
1980	18469.099710409708
1981	19071.73751214412
1982	19106.671756314874
1983	19392.482362362418
1984	19319.3160332709
1985	19747.85685576618
1986	20259.439888536584
1987	21358.133970308023
1988	21618.444559467596
1989	21376.94893460371
1990	22241.663460592732
1991	22560.91589830836
1992	23485.75087170106
1993	23811.19182359247
1994	24926.021921488053
1995	25872.230421626864
1996	26698.23157404486
1997	27026.481426092512
1998	27502.57384772225
1999	27704.02159742164
2000	29321.325400748447
2001	28733.941260550106
2002	28128.846069125804
2003	28010.607455695816
2004	28836.51318481045
2005	29503.90146202452
2006	30605.155998752725
2007	31880.345053738347
2008	32337.197710965494
2009	31852.267197322308
2010	33048.55458903615
2011	34247.62328071496
2012	34491.16010711808
2013	35348.306853715236
2014	36035.25775228837
2015	36206.52221716209
2016	37109.02181624881
2017	37953.0404593554
2018	38744.16044048107
2019	39591.36875785157
2020	38176.75433725868
2021	40772.970486461614
2022	42710.77822162938
2023	42674.300234371694